Michael Saylor buying $500m or even a billion with his strategy.
How to know when has he entered in the buying spree by looking at the price movements or charts?
You will have to be updated with his social life, I mean if you wanted to know whether he will buy or sell off bitcoin. Then you may follow his twitter and see if he move some bitcoins or not. You cant actually see it just by looking at chart. But then, the price eventually affected the moment he buy worth millions or billions of bitcoin.